Online calculators
One-layer inductance coil calculator:
If you need to make homebrew inductance coil for the matching circuit, for an amplifier, for magic crystal radio etc, you have some question:
- how many turns have the coil
- which diameter and length of the winding
- which wire is needed to use
The design of winding you have to choose empirically by the following common advice. Most of the online calculators enable to find inductance of the coil knowing its winding dimensions and number of turns. This calculator help for you to estimate the number of turns of your homebrew one-layer R.F. inductor or choke on the design stage. The calculator uses Bob Weaver's equation with round wire corrections. The windows version of Coil32 makes it possible to calculate the self-capacitance and Q-factor of the single-layer coil.
Calculate number of turns
ENTER THE INPUT DATA:
Select units: | AWG → | SWG → |
L | = | – Required inductance | |
D | – Diameter of coil-former | ||
d | – Diameter of wire without insulation | ||
k | – Diameter of wire with insulation | Automatic |
N | = | – number of turns |
l | – Length of winding |
Coil32 also estimates Q-factor and self-capacity of the single-layer RF coil.
Below you can see the references to best online calculators by my opinion, that enable to find inductance of the ready-made inductor.
References:
- Single-layer Coil Inductance calculator by IN3OTD
- RF Inductance Calculator by ON4AA
- Round Coil Inductance Calculator by R.Weaver